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Trash star 14 EP

HD 51382

RA 104.0812° · Dec -21.6984° · star

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Score breakdown

· 3 badges
14 pts · Trash
Trash 15 pts → Common
  • Giant star +6
  • White A-type star +5
  • Star +3
Total score 14

1 more point to reach Common.

Badges

  • Star · +3
  • White A-type star · +5
  • Giant star · +6

Trivia

Hard to believe

  • True brightness. It pours out about 1.1 million times as much light as the Sun. It only looks ordinary because it is so far away.

What it actually is

  • Spectral class. Its spectrum reads A2/A3III/IV — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.

Find it in the sky

  • How to spot it. At magnitude 9.7 you'll want a small backyard telescope, over in Canis Major.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around January — that's when to go looking.

Its true colour

  • Its true colour. Measured through blue and visual filters it comes out brilliant white (B−V 0.2) — hotter and whiter than the Sun, the colour of Sirius or Vega.
  • Why no green stars. No star ever looks green: a surface hot enough to peak in green also floods out plenty of red and blue, and your eye blends the mixture back to white.

By the numbers

  • Surface temperature. Its colour puts the surface at roughly 8520 K, against the Sun's 5778 K.

Properties

absmag
-10.3
bv
0.156
constellation
CMa
luminosity
1148153.6215
mag
9.7
name
HD 51382
spect
A2/A3III/IV

About HD 51382

HD 51382 is a trash star. It sits in the constellation CMa, shines at apparent magnitude 9.7 and has spectral type A2/A3III/IV.

Its spectrum reads A2/A3III/IV — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.

How to see it

Look for HD 51382 in the constellation CMa. At apparent magnitude 9.7, a small backyard telescope will bring it into view.

Like any astronomical target, HD 51382 is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why HD 51382 is a trash star

HD 51382 scores 14 points on Spacedle's rarity scale, which places it in the trash tier. Another 1 point would lift it into a rarer tier.

That score comes from 3 science badges — Star, White A-type star and Giant star — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.